glIndexPointerEXT(3G) OpenGL Reference glIndexPointerEXT(3G)
NAME
glIndexPointerEXT - define an array of color indexes
C SPECIFICATION
void glIndexPointerEXT( GLenum type,
GLsizei stride,
GLsizei count,
const GLvoid *pointer )
PARAMETERS
type Specifies the data type of each color index in the array.
Symbolic constants GLSHORT, GLINT, GLFLOAT, or GLDOUBLEEXT,
are accepted.
stride Specifies the byte offset between consecutive color indexes. If
stride is zero the color indexes are understood to be tightly
packed in the array.
count Specifies the number of indexes, counting from the first, that
are static.
pointer Specifies a pointer to the first index in the array.
DESCRIPTION
glIndexPointerEXT specifies the location and data format of an array of
color indexes to use when rendering using the vertex array extension.
type specifies the data type of each color index and stride gives the
byte stride from one color index to the next allowing vertexes and
attributes to be packed into a single array or stored in separate arrays.
(Single-array storage may be more efficient on some implementations.)
count indicates the number of array elements (counting from the first)
that are static. Static elements may be modified by the application, but
once they are modified, the application must explicitly respecify the
array before using it for any rendering. When a color index array is
specified, type, stride, count and pointer are saved as client-side
state, and static array elements may be cached by the implementation.
The color index array is enabled and disabled using glEnable and
glDisable with the argument GLINDEXARRAYEXT. If enabled, the color
index array is used when glDrawArraysEXT or glArrayElementEXT is called.
Use glDrawArraysEXT to define a sequence of primitives (all of the same
type) from pre-specified vertex and vertex attribute arrays. Use
glArrayElementEXT to specify primitives by indexing vertexes and vertex
attributes.
NOTES
Non-static array elements are not accessed until glArrayElementEXT or
glDrawArraysEXT is executed.
Page 1
glIndexPointerEXT(3G) OpenGL Reference glIndexPointerEXT(3G)
By default the color index array is disabled and it won't be accessed
when glArrayElementEXT or glDrawArraysEXT is called.
Although it is not an error to call glIndexPointerEXT between the
execution of glBegin and the corresponding execution of glEnd, the
results are undefined.
glIndexPointerEXT will typically be implemented on the client side with
no protocol.
Since the color index array parameters are client side state, they are
not saved or restored by glPushAttrib and glPopAttrib.
glIndexPointerEXT commands are not entered into display lists.
glIndexPointerEXT is part of the EXTvertexarray extension, not part of
the core GL command set. If GLEXTvertexarray is included in the string
returned by glGetString, when called with argument GLEXTENSIONS,
extension EXTvertexarray is supported.
ERRORS
GLINVALIDENUM is generated if type is not an accepted value.
GLINVALIDVALUE is generated if stride or count is negative.
ASSOCIATED GETS
glIsEnabled with argument GLINDEXARRAYEXT
glGet with argument GLINDEXARRAYSIZEEXT
glGet with argument GLINDEXARRAYTYPEEXT
glGet with argument GLINDEXARRAYSTRIDEEXT
glGet with argument GLINDEXARRAYCOUNTEXT
glGetPointervEXT with argument GLINDEXARRAYPOINTEREXT
MACHINE DEPENDENCIES
On RealityEngine, RealityEngine2, and VTX systems, do not enable or
disable GLVERTEXARRAY, GLVERTEXARRAYEXT, GLNORMALARRAY,
GLNORMALARRAYEXT, GLCOLORARRAY, GLCOLORARRAYEXT,
GLINDEXARRAY,GLINDEXARRAYEXT, GLTEXTURECOORDARRAY,
GLTEXTURECOORDARRAYEXT, GLEDGEFLAGARRAY or GLEDGEFLAGARRAYEXT
between a call to glNewList and the corresponding call to glEndList.
Instead, enable or disable before the call to glNewList.
Page 2
glIndexPointerEXT(3G) OpenGL Reference glIndexPointerEXT(3G)
SEE ALSO
glArrayElementEXT, glColorPointerEXT, glDrawArraysEXT,
glEdgeFlagPointerEXT, glEnable, glGetPointervEXT, glNormalPointerEXT,
glTexCoordPointerEXT, glVertexPointerEXT
Page 3